Spring-wheel.



No. 775,806. PATENTED NOV. 22, 1904. E.- EINFELDT.

SPRING WHEEL.

APPLIUATION FILED MAY 18. 1904.

N0 MODEL. 3 SHEETS-SHEET l.

PATENTED NOV. 22, 1904.

E. BINFELDT. SPRING WHEEL.

APPLIUATION FILED MAY 18, 1904.

3 SHEETB-SHEET 2.

-w lllllllllllllll N0 MODEL.

PATENTED NOV. 22, 1904.

E. EINFELDT.

SPRING WHEEL.

APPLICATION FILED MAY 18 1904.

3SHBETS-SHEET 3.

N0 MODEL.

Patented November 22, 1904:.

Miran Srafss arena? Optics.

EMIL EINFEL'DI, OF DAVENPORT, IOWA, ASSIGNOR TO b l lll'lll lNDORF METAL 'WHEEL COMPANY, A OORPORAJJON OF IOWA.

SPHll'tlG-WHEEL.

SPECIFICATION forming part of Letters Patent No. 775,806, dated November 22, 1904.

Serial No. 208,525. (No model) To a, who/1t 11/; may concern:

Be it known that I, EMIL EINFELD'T, of Davenport, county of Scott, and State of Iowa, have invented a new and useful Improvement in Spring-VVheels, of which the following is a specification.

The object of this invention is to produce a metal wheel of the type known in the art as spring-wheel, which while possessing a marked degree of springiness will be light, strong, and of extreme durability.

with these ends in view the invention consists of a wheel in which the hub is formed of complementary hub members or spiders provided each with a series of radiating springarms, to which the inner ends of the spokes are attached.

The invention also consists in a hub member or spider comprising a plate or body having an opening to receive the axle-box and a series of spring-arms radiating from said body and formed integral therewith and disposed at their outer free ends so as to overhang the axlebox.

The invention consists also in the details of construction and combination of parts here inafter described and claimed.

In the accompanying drawings, Figure l is a side elevation of my improved wheel in its preferred form. Fig. 2 is a longitudinal central sectional elevation of the same. Fig. 3 is a perspective view of the hubspider. Fig. 4 is a view in the nature of a diagram, show ing the position of the members of the wheel before being finally assembled in operative relations. Fig. 5 is a longitudinal sectional view of a modified form of the wheel.

Referring to the drawings, particularly to Figs. 1, 2, and 3, which illustrate the preferred form of my invention, A A represent two hub members each of which, as shown particularly in Fig. 3, consists of a plate or body portion a, to which are intogrally connected a series of radiating springarms a, curved so as to extend at their outer free ends in planes at right angles, or substantially so, to the plane of the body, the arrangement being such that when the two hub members are assembled in operative relations side by side, as shown in Fig. 2, the ends of the spring-arms will overhang the longitudinal axis of the hub and will constitute springsupports for the inner ends of the spokes B, which are lirmly attached thereto in any suitable manner and which have their outer ends secured to the rim O of the wheel.

The two hub-spiders are held and maintained in operative relations by an axle-box D, extending through openings a in the centers of the spiders, which are spaced apart by a spacing-collar E, encircling the box between the two spiders and affording bearings at its opposite ends for the adjacent faces of the said spiders. These parts are held firmly and fixedly in their proper relations by means of a nut F, screwed onto the box at the outer side of the spider A. and acting to bind the parts together and force the spider A tightly against an annular shoulder (Z on the axle-box at the outer side of the spider A. When the parts of the hub are assembled in these relations, with the inner ends of the spokes connected with the spring-arms and their outer ends with the rim, the wheel is under tension-that is to say, there is a uniform strain on the respective arms and spokes-the degree of which depends on the extent to which the two hub-spiders are held apart by the spacing-collar E. This tension is preferably produced by first securing the spokes to the rim and spring-arms in such manner that the two spiders will be drawn together face to face, as shown in Fig. L, the result being that when they are separated to admit the spacing-collar between them the arms and spokes will be placed under considerable tension, distributed evenly and uniformly throughout the structure.

In its preferred form the two spiders are so disposed relatively that the arms of one will be opposite the spaces between the arms of the other, which arms will extend in opposite directions away from each other, as shown in Fig. 2, each spider being thus wholly on one side of the plane of the rim. 1 may, however, adopt the arrangement illustrated in Fig. 5, where it will be seen that the arms of the two spiders are extended in opposite directions to ward each other, those of one spider being ar- 4. In a wheel, ahub embracing complemenranged in the spaces between the arms of the tary independent spiders consisting each of a other, the result being that they overlap each body portion arranged in a plane transverse other, so that the inner ends of the arms lie to the axis of the wheel and integral radiating 5 on one side of the plane of the rim of the spring-arms connected with said plates, in 35 wheel, while their outer ends lie on the oppocombination with spokes secured to said arms. site side of said plane. 1 5. In a spring-wheel, a hub comprising two Having thus described my invention, what spiders, each consisting of a plate and radiat- I claim is ing spring-arms, in combination with an axle- IO 1. In awheel, ahub comprising complemenbox on which said plates are mounted, a 4 tary members spaced apart in the direction of spacing device on the box between the plates, the axis of the wheel and provided each with means for maintaining said parts in fixed respring-arms, in combination with spokes selations, and spokes secured to the free ends of cured to said arms. I the spring-arms.

5 2. In a wheel, a hub comprising two spiders 6. Ahub-spider consisting oiaplate or body 45 consisting of a body portion or plate arranged portion adapted to be secured to the-axle-box in planes transverse to the longitudinal axis in a plane transverse to the axis of the wheel, of the hub, and provided with radiating and spring-arms radiating from said plate and spring-arms extending at their extremities in adapted to have the spokes fastened to them.

planes parallel or substantially so with the 7 A hub-spider consisting of a flat plate 5 longitudinal axis of the hub, in combination formed with an opening to receive the axlewith spokes secured to the extremities of said box, and integral radiating spring-arms adaptarms. ed to have the spokes secured thereto.

3. In a wheel, the combination of an axle- In testimony whereof I hereunto set my 5 box, two plates mounted thereon and extendhand, this th day of April, 1904:, in the presing in planes transverse to "the axis of the ence of two attesting witnesses.

wheel with a space between them, means for EMIL EINFELDT. holding the plates fixedly in position, spring- IVitnesses: arms radiating from said plates, and spokes A. NEILsON,

3 secured to the ends of said spring-arms. M. LOUISE DODGE. 

